Overpressure is always considered as a severe problem in the oil industry. Besides creating life risks through serious accidents while drilling, failure to correctly identify high-pressure intervals causes a significant increase in costs and prolongs the drilling process. Kazhdumi Formation in the Abadan Plain is considered as a high-pressure formation in several wells. Various reasons can cause overpressure problem. Hydrocarbon generation is one cause of abnormal pressure in source rocks. Understanding hydrocarbon generation potential can be a helpful approach since the Kazhdumi Formation is considered as a probable source rock in this area. In this paper, in order to better understand the problem of abnormal pressure in Kazhdumi Formation, geochemical concepts and tools have been applied. To that way, 1D petroleum system modeling of five wells was done, and the thermal maturity level of Kazhdumi Formation was determined and then, compared with drilling records. The results indicate that in wells where this formation has sufficient organic matter and has reached an early mature level, there is an abnormal pressure problem. Otherwise, this formation does not show abnormal pressure. Also, geochemical data are not available in all drilled wells, which makes impossible the assessing of hydrocarbon generation role. Therefore, petrophysical well logs (sonic (DT), neutron (NPHI), density (RHOB), spectral gamma ray (SGR), and resistivity (RES)) as well as 137 sets of geochemical data belonging to 13 wells from 7 oilfields in the Abadan Plain were used to predict geochemical indicators. Using artificial neural networks, geochemical data of a well in Abadan Plain were predicted. This selected well has a high-pressure problem in Kazhdumi Formation, but no geochemical data are available in this well. The results of predicted geochemical data show that the high-pressure phenomenon in this well may also be due to hydrocarbon generation. The precise understanding of the abnormal pressure, resulting from hydrocarbons generation, requires comprehensive studies and a full investigation of the studied area. However, the results of this paper help to predict approximately the behavior of the source rocks before drilling. Acquiring this overview will aid in reducing drilling hazards and costs.

超压一直被认为是石油工业的一个严重问题。除了在钻井时发生严重事故而造成生命风险外，未能正确识别高压间隔还会导致成本显着增加并延长钻井过程。阿巴丹平原的 Kazhdumi 地层被认为是多口井中的高压地层。各种原因都会导致超压问题。生烃是烃源岩压力异常的原因之一。了解油气生成潜力可能是一种有用的方法，因为卡日杜米组被认为是该地区可能的烃源岩。本文为了更好地理解卡日杜米组异常压力问题，应用了地球化学概念和工具。为此，对5口井进行了一维含油气系统模拟，确定了卡日杜米组的热成熟度水平，并与钻井记录进行了比较。结果表明，该地层有机质充足且已达到早期成熟水平的井存在异常压力问题。否则，这个地层并不会表现出异常的压力。此外，地球化学数据并非在所有钻探井中都可用，这使得评估碳氢化合物生成作用变得不可能。因此，获得了石油物理测井曲线（声波（DT）、中子（NPHI）、密度（RHOB）、能谱伽马射线（SGR）、电阻率（RES））以及7个油田13口井的137组地球化学数据。阿巴丹平原被用来预测地球化学指标。利用人工神经网络，预测了阿巴丹平原一口井的地球化学数据。该井在Kazhdumi 组存在高压问题，但该井没有地球化学数据。地球化学预测结果表明，该井的高压现象也可能是生烃所致。要准确了解碳氢化合物生成引起的异常压力，需要对研究区域进行全面研究和全面调查。然而，本文的结果有助于在钻探前大致预测烃源岩的行为。了解这一概述将有助于减少钻井危险和成本。